After he begot Mahalalel, Cainan lived eight hundred and forty years, and had sons and daughters.

For after seven more days I will cause it to rain on the earth forty days and forty nights, and I will destroy from the face of the earth all living things that I have made.”

And the rain was on the earth forty days and forty nights.

Now the flood was on the earth forty days. The waters increased and lifted up the ark, and it rose high above the earth.

So it came to pass, at the end of forty days, that Noah opened the window of the ark which he had made.

Suppose there were five less than the fifty righteous; would You destroy all of the city for lack of five?” So He said, “If I find there forty-five, I will not destroy it.”

And he spoke to Him yet again and said, “Suppose there should be forty found there?” So He said, “I will not do it for the sake of forty.”

Isaac was forty years old when he took Rebekah as wife, the daughter of Bethuel the Syrian of Padan Aram, the sister of Laban the Syrian.

When Esau was forty years old, he took as wives Judith the daughter of Beeri the Hittite, and Basemath the daughter of Elon the Hittite.

thirty milk camels with their colts, forty cows and ten bulls, twenty female donkeys and ten foals.

And Jacob lived in the land of Egypt seventeen years. So the length of Jacob’s life was one hundred and forty-seven years.

Forty days were required for him, for such are the days required for those who are embalmed; and the Egyptians mourned for him seventy days.

And the children of Israel ate manna forty years, until they came to an inhabited land; they ate manna until they came to the border of the land of Canaan.

So Moses went into the midst of the cloud and went up into the mountain. And Moses was on the mountain forty days and forty nights.

You shall make forty sockets of silver under the twenty boards: two sockets under each of the boards for its two tenons.

and their forty sockets of silver: two sockets under each of the boards.

So he was there with the Lord forty days and forty nights; he neither ate bread nor drank water. And He wrote on the tablets the words of the covenant, the Ten Commandments.

Forty sockets of silver he made to go under the twenty boards: two sockets under each of the boards for its two tenons.

and their forty sockets of silver: two sockets under each of the boards.

The Year of Jubilee

‘And you shall count seven sabbaths of years for yourself, seven times seven years; and the time of the seven sabbaths of years shall be to you forty-nine years.

those who were numbered of the tribe of Reuben were forty-six thousand five hundred.

those who were numbered of the tribe of Gad were forty-five thousand six hundred and fifty.

those who were numbered of the tribe of Ephraim were forty thousand five hundred.

those who were numbered of the tribe of Asher were forty-one thousand five hundred.

And his army was numbered at forty-six thousand five hundred.